HE3d/huxley extruder Herringbone gears

my printer came with badly printed gears, i looked for some better ones but they didnt work, so i customized some to work

i included the .scad file so you can edit them in openscad
i added a file with the drop shaped holes in the large gear

they print well at
50% infill
0.3 mm layer height
3 shells

you might have to enlarge the shaft holes a little bit, i had to

motor gear: 11t
extruder gear: 53t